Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/f042d2127347
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #21235 from snowmantw/issue1020917-2.0"

This reverts commit ee4cc647c7a599b210f9d8e76505f22926539d79, reversing
changes made to 7ad00b0bd84d5d97e0801e3b3ceaac33fcd90e05.
Bumping manifests a=b2g-bump